[Unit]
Description=Screener STUN discovery service
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=turnserver
Group=turnserver
RuntimeDirectory=coturn
RuntimeDirectoryMode=0750
ExecStartPre=/usr/bin/test -r /etc/screener/turnserver.conf
ExecStart=/usr/local/bin/turnserver -c /etc/screener/turnserver.conf
Restart=on-failure
RestartSec=3s
LimitNOFILE=65536
UMask=0077

NoNewPrivileges=true
PrivateDevices=true
PrivateTmp=true
ProtectSystem=strict
ProtectHome=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectKernelLogs=true
ProtectControlGroups=true
ProtectClock=true
ProtectHostname=true
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX AF_NETLINK
RestrictNamespaces=true
RestrictRealtime=true
RestrictSUIDSGID=true
LockPersonality=true
CapabilityBoundingSet=
SystemCallArchitectures=native

[Install]
WantedBy=multi-user.target